Got it. Thanks.
Alan
Got it. Thanks.
Alan
No problem.
I think you'll find that manufacturers with a bit of video history/involvement are much more likely to include features/tools that help with setting good exposure.
@DannoLeftForums has written: @DonaldB has written:im sory but that is not the represented histogram but a made up one ,here is the proper histogram.
Again you are posting images that cannot be verified, especially given your history of faking images to suit the agenda you are pushing at the time.
lets see who has the last laugh with the link i just posted smart......a
So what point are you attempting to make? The content cannot be verified, so who knows where it came from and how it was created, especially since you have a history of faking images to suit the agenda you are pushing at the time.
@JohnSheehyRev has written: @IliahBorg has written:Well, here is from one of raw files Donald posted for everyone to see:
The clouds do not actually clip much in the RGB histogram or image, but the levels are so compressed in the upper highlights to get the clouds under "255" that it is posterization city if you try to recover cloud detail from this, because the level of noise is too low to prevent posterization.
im sorry but that is not the represented histogram but a made up one ,here is the proper histogram.
here is the file link
I don't need to make up or fake anything. Everyone can see that I posted an unmodified screen capture :)
@AlanSh has written: @DannoLeftForums has written:Apps like RawDigger will output a raw histogram for each of the red, green and blue channels.
But as soon as you do that, you are not looking at 'raw' data, you are applying some sort of colour interpretation.
Alan
No, you are looking at the raw data for each channel. The sensor has either a red, green or blue filter above each pixel.
Source: electronics.howstuffworks.com/cameras-photography/digital/digital-camera5.htm (14 May 2023)
In a lot of cases raw data is not encoded as RGGB, or encoded using lossy compression (can be RGGB, can be not). In RawDigger there are tools to look at the original data before full RGGB reconstruction.
@DannoLeftForums has written: @AlanSh has written: @DannoLeftForums has written:Apps like RawDigger will output a raw histogram for each of the red, green and blue channels.
But as soon as you do that, you are not looking at 'raw' data, you are applying some sort of colour interpretation.
Alan
No, you are looking at the raw data for each channel. The sensor has either a red, green or blue filter above each pixel.
Source: electronics.howstuffworks.com/cameras-photography/digital/digital-camera5.htm (14 May 2023)
In a lot of cases raw data is not encoded as RGGB, or encoded using lossy compression (can be RGGB, can be not). In RawDigger there are tools to look at the original data before full RGGB reconstruction.
Ok, thank you :-)
@bobn2 has written:You can make a histogram of any data. If you make one of raw data it tells you about what is the distribution of data numbers in the raw file, which is what you need if trying to optimise raw exposure.
I agree in theory (mathematically)but can you do that in reality? To do that, you have to know where the numbers are for each different sensor and also what they represent. So, unless you have a large table of 'sensor value' vs ' data bits', how can you say what the raw data is actually telling you?
Alan
Many cameras include certain metadata (black level, white level, midtone calibration) in makernotes as a part of raw file. For those few that don't (edit: or we don't know where it is or how to decipher it) we do tests to find the necessary values to scale the histogram.
@IliahBorg has written:Well, here is from one of raw files Donald posted for everyone to see:
The clouds do not actually clip much in the RGB histogram or image, but the levels are so compressed in the upper highlights to get the clouds under "255" that it is posterization city if you try to recover cloud detail from this, because the level of noise is too low to prevent posterization.
Just to make sure we are on the same page: the histogram you are referencing is one of the embedded JPEG.
@IliahBorg has written: @DannoLeftForums has written: @AlanSh has written: @DannoLeftForums has written:Apps like RawDigger will output a raw histogram for each of the red, green and blue channels.
But as soon as you do that, you are not looking at 'raw' data, you are applying some sort of colour interpretation.
Alan
No, you are looking at the raw data for each channel. The sensor has either a red, green or blue filter above each pixel.
Source: electronics.howstuffworks.com/cameras-photography/digital/digital-camera5.htm (14 May 2023)
In a lot of cases raw data is not encoded as RGGB, or encoded using lossy compression (can be RGGB, can be not). In RawDigger there are tools to look at the original data before full RGGB reconstruction.
Ok, thank you :-)
That was to say that Alan has a point. Raw histogram in RGGB from a lossy compressed / non-RGGB file is as accurate as the full RGGB reconstruction is. There are ways to verify the accuracy, and one can also compare histogram from such a file to the histogram from the derived DNG (using Adobe DNG converter).
@DonaldB has written: @DannoLeftForums has written: @DonaldB has written:im sory but that is not the represented histogram but a made up one ,here is the proper histogram.
Again you are posting images that cannot be verified, especially given your history of faking images to suit the agenda you are pushing at the time.
lets see who has the last laugh with the link i just posted smart......a
So what point are you attempting to make? The content cannot be verified, so who knows where it came from and how it was created, especially since you have a history of faking images to suit the agenda you are pushing at the time.
He is defending his pallet of tools, trying to say the raw is clipped when it is not. One push of a button in FastRawViewer (highlight inspection) shows how it is.
the people who produce raw conversion software know.
Alas, some of the people who produce raw conversion software don't bother with this.
[quote="@xpatUSA"]
Donald and Alf win - nobody else knows anything ..,..Look Officer there is no way that I could be speeding and there is no way that I was traveling at 150 kmph when my speedometer only goes to 100
Excellent ... shades of Rodney King and Spinal Tap ...
@DonaldB has written: @DannoLeftForums has written: @DonaldB has written:im sory but that is not the represented histogram but a made up one ,here is [not] the proper histogram.
Again you are posting images that cannot be verified, especially given your history of faking images to suit the agenda you are pushing at the time.
lets see who has the last laugh with the link i just posted smart......a
I wish both of you would just please stop. Let the other have the last word and Ignore.
I wish I could ignore the main perp but his inanities are impossible to ignore.
As we approach 600 posts in this thread, DPR's limit of 150 is beginning to make a lot of sense, eh?
I wish both of you would just please stop. Let the other have the last word and Ignore.
FINALLY SOMEONE MAKING SOME GODDAMN SENSE IN THIS PLACE. This is why this forum is doomed. DOOMED.
@MarshallG has written:I wish both of you would just please stop. Let the other have the last word and Ignore.
FINALLY SOMEONE MAKING SOME GODDAMN SENSE IN THIS PLACE. This is why this forum is doomed. DOOMED.
Ouch, I wasn't using ear protection.
I wish all five perps would just please stop.
Post #599 - who'll hit the coveted 600 ??!
Come back, thread post count limit - all is forgiven ...
I think there would be potential to monetize this perpetual motion. Creating an YouTube channel called "Exposure Bumfight" or something like that and have hours upon hours of back-and-forth might well be an underground hit even among people who are not into photography at all. After all, a lot of people get hooked on equally bizarre reality series.
Unbelievable how childish 'some' so called grown ups can be isn't it? ALL the things this world has to offer and they do THIS? A desperate and childish NEED to save face and be seen as 'right' on an internet forum to complete strangers. Or just the childish desire to constantly bicker. Social media / computer addiction feeds into this too.
I understand the emotional rhetoric.
So, if you put forth an argument and someone disagrees by means of a rebuttal, what do you do, personally?
If you do respond to the rebuttal and that person comes back with yet another rebuttal ad nauseam - at what point does nauseam commence for you and is that point the same for all members? I think not because, as a cripple with nothing better to do than to trawl around the internet participating in interesting (to me) discussions, I can continue to rebut a false argument until the sun goes down whereas another member might quit after responding to only one rebuttal.